Cloud Infrastructure · Montgomery, Alabama · Est. 2015

We mark every single point of failure on the diagram.

GreenSystem Networks designs and operates cloud infrastructure for organisations across Alabama and the Southeast. Every architecture we deliver labels its single points of failure explicitly, including the ones we chose not to remove and why.

GreenSystem Networks, Montgomery, AL
10Years in Montgomery
220Environments delivered
100%Diagrams with SPOFs marked
13Engineers, all local
Our Position

Architecture diagrams are drawn to look resilient.

Boxes, arrows, a load balancer, the word redundant used twice. What the diagram does not mark is that both application nodes share one NAT gateway, that the whole thing depends on a single DNS provider, or that failover has never been tested end to end because testing it means a planned outage nobody wants to schedule.

Every architecture has single points of failure. Removing all of them costs more than most organisations should spend, so accepting some is correct engineering. What is not correct is leaving them unlabelled, because then nobody made a decision about them.

So our diagrams mark each one, with the cost of removing it and our recommendation. About a third get accepted deliberately. The client at least knows where the environment breaks, which is more than most know about infrastructure they already own.

Every architecture has single points of failure. The dangerous ones are the unlabelled ones.
Topology

The path, with failure points named.

An abbreviated reference topology. Each node is labelled with its redundancy status.

DNS providerSPOF — accepted
Edge / CDNmulti-region
Load balancermulti-AZ
App tier3 nodes, 2 AZ
NAT gatewaySPOF — removed
Service meshmulti-AZ
Primary databasemulti-AZ, tested
Read replicacross-region
Backup storecross-region, restored monthly
Identity providerSPOF — accepted
Secrets storemulti-AZ
CI pipelineSPOF — accepted
Our Services

Six services.

Thirteen engineers in Montgomery. No offshore delivery, no vendor partnerships.

01

Cloud Architecture

Target-state design with every single point of failure marked and costed.

4–10 weeks
02

Migration

Staged migration to AWS or Azure with the legacy environment live in parallel.

3–9 months
03

Platform Operations

Monitoring, patching, and on-call with response times we publish and miss occasionally.

monthly
04

Failover Testing

Scheduled failover exercises, including the ones that fail. Reports go to you unedited.

quarterly
05

Cost Optimisation

Right-sizing and commitment planning, reported as savings not as a percentage of savings.

project
06

Security Review

Configuration and access review against CIS benchmarks, with findings prioritised by exposure.

assessment
GreenSystem Networks at work
How We Work

Failover tested quarterly

We schedule real failover exercises and send you the report unedited. About one in five surfaces something the architecture diagram did not predict. Providers who do not test have the same rate and find out during an incident.

No vendor partnerships. Nothing we specify earns us margin or a tier, so the AWS-versus-Azure recommendation carries information.

Everything lives in your accounts with infrastructure as code in your repositories. Changing provider does not mean rebuilding.

Method

Four stages.

01

Review

Current environment mapped, with the unlabelled failure points found.

02

Design

Target topology with every SPOF marked, costed, and recommended on.

03

Deliver

Staged, parallel where possible, infrastructure as code in your repos.

04

Operate

Monitoring, on-call, and quarterly failover tests reported unedited.

GreenSystem Networks clients
Who We Serve

Southeast organisations of 50 to 1,200

State and municipal agencies, healthcare systems, logistics operators, credit unions, and manufacturers across Montgomery, Birmingham, Huntsville, and the Southeast.

Engagements from about $45,000 to $900,000, with platform operations retained monthly.

We decline roughly one enquiry in six, usually where a lift-and-shift is scoped and the honest answer involves application work we do not do.

The Team

Who does the work.

Brianna Hayes, principal at GreenSystem Networks

Brianna Hayes

principal

Founded the firm in 2015. Signs off every topology and its SPOF list.

Infrastructure Lead, architecture at GreenSystem Networks

Infrastructure Lead

architecture

Fifteen years across AWS and Azure with no certification-driven preference.

Platform Lead, operations at GreenSystem Networks

Platform Lead

operations

Twelve years. Runs on-call and publishes the response numbers.

Security Lead, review & compliance at GreenSystem Networks

Security Lead

review & compliance

Eleven years. Orders findings by exposure, not scanner severity.

Clients

What they report.

Their diagram marked our identity provider as an accepted single point of failure. Nobody had ever told us we had made that decision.
Client of GreenSystem Networks
Director of ITHealthcare system
A failover test failed and they sent us the report as-is. We fixed it on a Tuesday instead of during an outage.
Client of GreenSystem Networks
Infrastructure ManagerLogistics operator
They recommended the provider they have no partnership with, and explained the reasoning in writing.
Client of GreenSystem Networks
CTOCredit union

Where does your environment actually break?

If your diagram does not say, that is the finding.

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